Granted Patent
Utility
US 4,371,039 · App. 06/253,571
Tool bar control for agricultural implement
Inventors:
Wayne J. Schaaf, Bennie J. Boswell
Patented Case
View Patent ↗
Granted: Feb 1, 1983
Filed: Apr 13, 1981
Inventors
Wayne J. Schaaf
Bennie J. Boswell
Assignee (at issue)
Chromalloy American Corp.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.